wifi: Fix VTS error for non-p2p devices

Fix VtsHalWifiSupplicantP2pV1_0TargetTest to skip tests
in such a way that VTS reports the module as complete on
devices that don't support Wifi Direct.

Bug: 170326147
Test: run vts -m VtsHalWifiSupplicantP2pV1_0TargetTest
Change-Id: Ia418c4bb72f4772422d724636453395c4ba9fb2d